Read the following assertion and reason to give the correct answer.
1.
| Assertion (A): | Electric heaters use nichrome wires as their heating elements. |
| Reason (R): | Nichrome has high resistivity and a high melting point, making it suitable for heating appliances. |
2.
| Assertion (A): | The heating effect of electric current is used in an electric fuse to protect electrical circuits. |
| Reason (R): | The resistance of a fuse wire is zero under normal operating conditions. |